Typewriting machine



May 2, 1939. w. F. HELMOND TYPEWRITING MACHINE Filed Feb; 20, 1937 4 Sheets-Sheet 1' y 1939- w. F. HELMOND 2,156,475

TYP EWRITING MACHINE Filed Feb.-20, 1937 4 Sheets-Shet 2-.

y 1939. w. F. HELMO ND TYPEWRITING MACHINE Filed Feb. 20, 1937 4 Sheets-Sheet 3 y 1939- w. F. HELMOND 2,156,475

TYPEWRITI'NG MACHINE' Filed Feb. 20. 1937 4 Sheets-Sheet 4 Inventor:

f Patented May 2, 1939 v UNITED STATES PATENT OFFICE TYPEWRITIN G MACHINE Application February 20, 1937, Serial No. 126,875 24 Olainis. (01. 197 -189) This invention relates to typewriters and'particularly to page alarms and signals, or to devices for indicating how many lines remain unwritten on a page, by the actuation of a signal.

5 A feature of the invention is a jingling repetitious signal actuated by the carriage to indicate the position of a, line. A repetitious alarm or signal, such as the tinkling of a'bell, the twinkling of a light, or the flashing. or blinking of a lightreflecting surface, for a. substantial interval'oi time, has a positive attention-arresting power, that commands the attenticnof even the speedy operator.

A further feature of the invention is an improved device for varying the point, with refererice to the bottom of the sheet, at which a signal is given.

Mechanism may be actuated by the line-space lever for rendering the signal inoperative during the carriage return.

Another feature is a camming-tooth rack for causing an intermittent actuation of the signal when-the carriage is moved across the frame. In one form of the invention, the camming rack the rack is mounted on the spring-drum mechaplaten but removed from the end such a distance that a sheet of paper, in position for typewriting, normally overlies the groove, and a paper-feeler is pivoted on the carriage and spring-pressed into the groove so that when the bottom of the sheet is reached the paper-feeler 7 drops into the groove and actuates a train of mechanism that closes an electrical circuit comprising a colored lamp suitably positioned on the typewriter for visibility. A knob on the left end of the carriage carries. an index; and is rotatable to set the mechanism to give a signal at the desired line removed. from the bottom of the paper sheet. A slide on the top of the left end of the carriage is yieldably held in two positions, one operative and the other inoperative. The intermittent actuation of the signal is accomplished by a rack mounted at the rear of the papertable and provided with a series of two-way camming teeth which are successively engaged by a dog that is mounted on the tabulator housing of the typewriter, as the carriage is moved across is mounted on the carriage and in another form the machine. Other mechanism provides for the case-shifting of the platen-carriage with the present invention applied to the typewriter.

Another form of the invention utilizes a similar platen groove and paper-feeler. But the lever that pivotally mounts the paper-feeler on the inside of the carriage has an upper forward procal signal circuit open while the carriage is returned. The intermittent actuation of the signal light is obtained by a. circular rack mounted on the spring-drum and having a series of cammingteeth'which' are successively engaged by a roller on the end of a linearly reciprocating rod whose movement makes and breaks the electrical signal circuit. A knurled knob on the front of the typewriter turns a helical cam to hold the circuitmaking rod out of contact with the cammin teeth on the spring-drum. An index pointer on the front of the typewriter indicates the on and 01f positions of the line-signaling device. The construction also permits of case-shifting to upper and lower case positions.

In either form of the invention current may be derived from any electric-light socket, which usual]; delivers a current at approximately 110 volts.

Other features and advantages will hereinafter appear.

In the accompanying drawings: Figure 1 is a left elevation, with parts sectioned and with parts removed, showing a camming--- tooth rack for actuating the electrical switch at the extreme left, at the right an adjusting plate rotatably mounted on the platen axle and on the bottom of which the paper-feeler is pivotally mounted, and'on the top of the left end. of the FigureZisa similar view but the paper sheet has passed the paper-feeler which has moved into signal-actuating position. The lower part of the'figure shows the mechanism that permits platen case-shifting. I

Figure'3 is a perspective view with parts broken away to show one of the embodiments of the invention.

figure 4 is a similar view with the slide in the rearwards position to lock the mechanism out of operative position.

Figure 5 is a left elevation, with parts sectioned and with parts removed," showing amodification ing a circular two-way camming tooth rack mounted on the front of the spring-drum, a rod under control of the paper-feeler and reciprocatable lengthwise-to engage the rack, a knurl on the front of the machine, for locking the rod,

' and an arm operated by the line-space lever for the rod.

The improvements are shown in an Underwood standard typewriter having a frame iii, a key-lever bracket ii, an escapement housing l2 rotatably mounting an escapement pinion I 3 and a ratchet-wheel I4, which are secured on the housing I2 by a screw l5, key-levers ii for actuating type-bars l1, and a track rail .IS on which a platen-carriage l9 rides on brackets depending beneath the rear of the carriage I9 from the crossbar 2|. A tabulator housing 22 maybe mounted centrally of and at the rear of the frame I 0. The front of the frame Ill mounts a scale-bar 23 and the front crossrods 24 and 25. The sides of the carriage I! are shown broken away at the front. Shiftkey levers 26 engage shift segments 21 which are mounted on a rock-shaft 28 in the frame III, the segments 21-mounting at the front a track-rail 29 which is raised and lowered to Y shift a platen 30 supported at the ends on arms 3| secured, one at each end, on a compensating rod 32 rotatably mounted at the rear of the carriage I 9. A spring-drum 35, containing a coil spring 36, is mounted in the frame l0 and winds a strap 31 which is also secured by a pin 38 to the carriage I! .to feed the latter in letter-. spacing when a carriage rack bar 39, which is pivotally mounted (see Figure 6) on -the car-' riage l9 by means of fixed endarms 42 and pivot screws 42 passing through the upper ends of said arms 40, engages theaescapement pinion l3. The platen 30 is mounted on a shaft 43 which is rotatably mounted in side plate 44- of the carriage 19, by means of knobs 45 at the ends of the shaft 43, on the left-end of which is a line-spacing-rack-wheel 46. A paper-table 41' and rolls 48, 49, 5!! feed a paper sheet 52 over the platen 30. A right-angled side plate 53 is mounted on an inwardly turned flange 54 r of the side plate 44 and covers the end of the carriage IS. A wing scale 55 is mounted on the frame" in front of the platen v3G. A roller 4| mounted on the carriage by a link 5| supports Y the carriage on the shift rail 29 and a keeper 6| keeps the roller 4! from jumping the track 25.

Referring to Figures 2, 3, and 4 a'circumferenq ti roove ibis fdrmed in the'platen 3| near left end. A paper-feelerv 51 is momtefat 1 end of anadjustable plate 52 rotatably seeu'red onIthe shaft 4: and held in one vertical we:

tlon against sidewise movement by 82 and four .quadraptly positioned v54.

anemia or the structure of the preceding views and hav- Mechanism for adjusting the plate 52 for varying the position of the paper-feeler 51 will be hereinafter more particularly described. The

-paper-feeler 51 is formed on the side toward the groove 5! with a right-angle cornered heel which presents opposite sides inclined at an angle of approximately 45 to the paper sheet 52.

This facilitates the insertion of the frontend wardly and supporting on the rear end a roller 89 which is held in the upper position shown in Figure 1 when the paper-feeler 51 is held out of the groove 55 by the papervsheet 52, and which is held in the lower position shown in Figure 2 when the bottom of the paper sheet 52 has been turned on the platen II to permit the paper-feeler 51 to be pulled into the groove 56 by means of a tension spring 10, the lower end of which is fastened to the front arm of the lever 59 and the upper end'to an ear 12 projecting forwardly from the adjusting plate 62.

In moving from the position shown in Figure 1 to that shown in Figure 2 the roller 69 engages the concave forward edge of a scimitar-like arm 13 pivoted on a screw 14 fastened on the inside of the side wall of carriage end plate 44. A spring 15 is secured on the upper rear edge of the arm 13 and is tied to the inside of the plate 44 at 8| above and to the rear of pivot screw 14, so that the arm i3 is held in yielding contact with the roller 69. A link 15 is pinned to the upper end of the arm 13, extends rearwardly, and pivotally engages the lower end of a bail arm 11 fast on the left end of a rock-arm or bail proper I8 each end of which is rotatable in the upper rear ends of arms I9 fastened by screws 8. at either side of the papertable 41. Only theleft arm 19 is shown. Fixed to and depending from the bail proper I8 is a straight fln 82 which therefore swings forwardly and backwardly as the roller 69 rises and falls on the arm II, or as the paper-feeler 51 rides on passed headed screws 85 which are'fastened horizontally in lugs 54 extending forwardly from the right end of the tabulator housing 22. A pin 92 (see Figure 2) in the-lower end of arm 88 engages a horizontal slot '93 formed in the end of a horizontal arm- 94 of a bell-crank 55 pivotally mounted on the vertical ear of'a bracket 98 fastened by screws -9| to thekey-lever bracket IL' The upper arm' of the bell-crank .95 has at its upper end ,a lateral pin 98 which is engaged a vertical slot 5 9 formed in the lower extremity of anarm ill flxed'on them tom of the case-shift rock-shaft 28 so that when and as the platen I. is shifted to upper-case position the arm "is also raised to upper-case position, and vice' versa.

the forward end of the forwardly projecting armofthebell-cmnkflispivotedad link I02 pivotally connected at its lower end to an ear I03 upstanding on the upper metal arm I04 of a switch I05, the rear end of the arm I04 being hinged at I06 to a metal piece I01 fixed on the upper surface of an insulating block I08 which is pinned to the right side of the arm 86 by pins I I I. The lower metal arm I09 is fixed on the lower surface of the insulating block I08. The electrical circuit IIO includes a lamp socket I I2, positioned on the frame I in such a position that a lamp ,I I3, which is preferably colored, is clearly visible to the operator, a switch H4 and a conventional plug II for connection with the usual house or.ofiice circuit of 110 volts. It is now clear that when the 'paper-feeler 51 drops into the groove 56 the switch I05 is closed, but that while the paper sheet 52 is holding the paper-feeler 51 out of the groove 56 the switch 105 is open. I

To assure arresting the attention of the operator, the signal lamp II3 may be caused to twinkle or blink by the following mechanism: On the bail proper 18, to the rear of the fin 82, is a rearwardly and downwardly extending flange I20 terminating at the rear in a downwardly and forwardly extending rib I2I having formed along its b'ottoma series of teeth I22 formed by shallow notches I23. The teeth I22 are equidistant and are positioned a few letter-spaces apart. The

teeth I22 and the intervening notches I23 are formed by straight sides that are low in pitch and form alternate similar and equal angles, andthe series of teeth and notches extends entirely across the rear of the carriage forming a rack with a series of two-way camming teeth. A dog I25 has a top exactly identical in size and form with one of the teeth I22 or one of the notches I23, is mounted on a bracket I26 secured on the upper end and on the left side of the arm 86, and extends upwardly and rearwardly in parallel with the teeth I22 when they are in the engaging position shown in Figures 2 and 3. When the paper sheet 52 is in the position shown in Figure l and is holding the paper-feeler 51 out of the groove 56 the rib -I'2I is tilted upwardly and rearwardly away from the dog I25. But when the paper 52 is in the Figure 2 page-en'dsignaling position, the feeler' 51 is in the groove 56 and permits the rib I2I to engage thedog I25. Then as the platen 30 and carriage I9 move along aline of typing, the rib I2I is cammed upwardly against the tension of the paper-feeler spring to the height of the tooth I22, thereby rockingthe shaft 18 clockwise, moving. the fin 82 rearwardly andsimultaneously tilting the upwardly extending arm 84 of the bell-crank 85 backwards on its pivot pin 81 to lift the link I02 and the .upper metal arm I04 of the switch I05 to break the electrical circuit H0 and extinguish the lamp II3. And as the dog I25 is passed by the end of a tooth I22, the rib I2I moves downwardly together with the metal arm IM to close the switch I05 and-the electrical circuit H0 and light the lamp H3. The rapidity of themoyement of the platen 30 and the carriage I9 across the typewriter determines the on-and-ofi frequency of the lighting of the lamp II3 so that for a speedy operator 'the .lamp II3 twinkles more than ordinarily and proportionally.

It is clear that the distance of the paper-feeler 51 below the wing scale 55, or in advance of the the position of the paper-feeler 51 may be varied by adjusting the position of the pivot screw 60,

' which supports the inner end of the lever arm 59 on which the paper-feler 51 is carried, with reference to the printing point approximate the wing scale 55, in order to give the page-end Sig-- nal the fourth, fifth, sixth, seventh, or eighth single-space line from the bottomjof the paper sheet 52. The pivot screw 60 is fixed on the bottom of theirotatable plate 62 and the plate 62 is so set that it is rotatable about the platen axle 43. The upper end of the plate 62 terminates in an arcuate toothed rack I24 of sufficient extent to move or adjust the paper-feeler 51 a distance equivalent to five line spaces on the paper sheet 52. A segment I21 has an arcuate toothed rack' I28, similar to' and engaging the rack I24, and is fixed on the end of a'shaft I29 which is rotatably mounted in the vertical plate 44 and the vertical portion of the plate 53. Stop pins I32 and I33 on the plate 44 limit the movement of the segment I21. A hub I34 on the shaft I29 spaces the segment I21 from the plate 44. On

the left end of the shaft I29 is mounted a small adjusting knob I35 having an index scale on its rim bearing theArabic numerals 41', 5, 6, ,7, and 8" which are so positioned with reference to a spring detent I36 mounted on the vertical portion of the plate 53 that when any numeral is opposite the detent I36 the paper-feeler 51 is positioned to begin to operate the signal the designated number of single-space lines from the bottom of the paper sheet 52. The detent I36.is mounted on the vertical portion of the plate 53 by means of a screw I31 and is yieldable to permit the knob I35 to be rotated to the several notches has a downwardly projecting stop I46 which is,

engageable with the upper right edge of the pivoted scimitar arm 13, when the slide I39 is pushed rearwards, to tilt the lower end of arm 13 forwards, which rocks the arm 59 to hold the paperfeeler 51 out of the groove 56. A small finger knob I41 is mounted 'on the slide I39 and contains a ball I48 which is downwardly pressed by a spring I49 into a front recess I50 or a rear recess I52 to hold the slide I39 in the adjusted'positions.

A modification is shown in Figures 5, 6, 7,, and 8 in which the paper-feeler 51 and its arm 58 are mountedon a rearwardly extendingarm I55, the latter being pivotally mounted on -a screw I56 passing through the left sideplate 44 and secured by a nut I51 on the ,outside of the plate. Mounted on the screw I56 between the arm I55 and the plate 44 is a depending arm I58 secured by a hub I59 to the arm I55 so that arm I55 and arm I58rock as a unit on the pivot screw I56. An arm I60 is similarto the arm I58 and is pivoted on a headed screw I6I exactly opposite the screw I56, the screw I-6I being fastened on the inside of theright side. plate I62. The lower ends of the arms I 58 and I60 are tied together by a real which lies in a central verticalslot' I formed in the upper end of an upstanding arm I66, thereby providing for case-shifting, the

lower end of which is fixed on a rock-shaft I61 horizontally mounted at the right end in a 50 two electrical terminals i9? at the rear.

I68 secures the insulation I85 to the nest 58%. A.

bracket I68 supported by the escapement housing I2. The left end of therock-shaft I61 is mounted on a post I68 secured by screws I16 to the key-lever bracket II.

provides for the facile assembly and mounting of the shaft I61. A depending arm I1 6" is set on the shaft I61 by a screw I and supports at its lower end on a pivot screw I86 the rear part 10 of a shaft I16 to the rear end of which a roller I," is pinned by a sidewardly extending pin I18.

In its rearward position the roller I11 is engageable with a circularcamming-tooth rack I82 which, aside from being circular, is otherwise 5 identical in size and form with the rib I2I and its teeth I22 and notches I23 in the other form of the invention shown in Figure 3. But the rack I82 is the rim of acup-likedisk I83 secured by screws I86 to the front wall of the spring-drum o 35. In the center of the disk I83 is shown the spring-adjusting screw I85. .As the carriage I9 moves across the frame I6, in either direction, the rack I82 rotates. The drum 85 is rotatably mounted (see Figure 5) on a hub I86 supported 25 on an arm I81 mounted in-the frame I6 and shown in section. When the paper-feeler 51 moves into the platen groove 56 the arm I58 rocks forwardly, together with the rod I64 and arm I66, swinging on an axis through the pivot screws I56, I6I. The forward motion of the rod I64.rocks the arm I66 forwardly to turn the rock-shaft I61 clockwise of Figure 5 and move the arm I16 and the shaft I16 rearwardly to engage the roller I 11 with the rack I82. The paper-feeler 51 is moved into the groove 56 by a spring I88 tied to the arm I and to a pin I88 transversely mounted on the left side plate 68, and it is clear therefore that the roller I11 is held yieldably against the rack I82 by the 4,0 spring I88, and as the rack I82 rotates the shaft I16 is wigwagged to and fro to make and break an electrical circuit.

As shown in Figures 5 and 8 a piece of insulationI86 is pinned to the forward end of shaft 45 I 16 and formed at the front end into a disk I82 separated from the remainder of piece I86 by a reduced neck I98. A nest it supports a block of insulation I85 having a socket I86 for an electric lamp 3 at the left of the machine, with A screw second block of insulation I88 is secured under the nest I at the front by a bolt 266 and nut 26I and at the rear a screw 253 passes up through 55 the nest I86 into the insulating block I85. The

block I88has a centrai demndlngwrtion 26%, on the rear of which is mound thecontact spring 265 and on the front of which is mounted the contact spring 266, by means of screws 261,

so on the left and on the right sides of the portion 266, respectively; and the lower ends of the springs 265 and 266 are turned inwardly to'over- 'lap and form a switch 266. The contactspring 266 is stationary but'the upper or neck portion 55 266 of the contactspring 266 is made thinner so that the lower portion. of the spring 266 is easily flexed forwardly and backwardly at the neck 268. A right-angled forwardly extending ear 2" is apertured to receive a pin12I2 which A collar I12 secured 5 by a set-screw I13 to the left end of the shaft I61 moved backwards and the switch 268 is closed. It is obvious that the rotation of the rack I62, when the carriage I8 is moved, causes the intermlttent lightning of the lamp II3 because an electrical circuit 2| I, connected with any suitable source of electrical power, such as a -volt lighting circuit, includes the switch 268 which makes the lamp II3 twinkle.

If the shaft I16 be locked in the forward position shown in Figure 5 it is obvious that the 1 switch 268 is,also locked open. On the rear of the front plate 2I3 is mounted a bracket 2, by means of a rivet 2 I5, the bracket 2 I4 providing a rotatablebearing for a pin 2I6 extending rearwardly from a hub 2I1 the reduced front end of j which has a bearing in the front plate 2| 3. The hub 2I1 supports radially a. helical cam 2I8, the outer edge of which lies in a geometrical cylindrical surface as indicated in Figure 7 that is contiguous to the neck I93, the left end of the helical cam 2I8 engaging the inside of the disk I82 as the hub 2I1 is rotated clockwise to lock the roller I11 in the forward position, or, in other words, to lock the switch 268, open. To rotate the hub 2I1 clockwise to engage the locking end of the helical cam 2I8 and the disk I92 a knurl 2 l8, supporting an index pointer 226 on the outside of the front plate 2I3, rotates the hub 2" from the index position on, towards the right, to the index position off, in which latter position the switch 268 is locked open.

The Underwood typewriter has on the left end of the carriage I9 a combined carriage-return 'and line-space lever 222 rotating in a horizontal plane on a vertical post 223 and having a foot 226 which swings rearwardly to push back a linespacing plunger 225 which has a downward extension 226 which engages the downwardly inclined forward end 221 of an upwardly and forwardly extending horizontal arm 228 that is a 4 continuation of the rear end of arm I55 to move the paper-feeler 51 out of the groove 56 and so prevent the signaling while thecarriage I8 is being returned to the right, but permitting a twinkling of the light, if the lock knurl 2| 9 is 4 on and a page-end has been reached, as the carriage travels in letter-spacing motion across the typewriter. On the inside of the front plate 258 a resilient finger 229 yieldably engages detent holes 236 and locks the index 226 in the 5 on and off positions.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim: 5

1. In a typewriter, in combination, a frame, a carriage mounted for reciprocatory movement thereon, a rotatable platen on the carriage and over which a paper-sheet is passed to receive lines of typing, a groove over which the paper 6 sheet travels, a paper-feeler pivotally mounted on the carriage and movable into and out of said groove, means tending to move said paper-feeler into said groove, a signal actuated by said paperfeeler, and means for holding the paper-feeler 6 1 out of the groove during carriage return.

2. In a typewriter, in combination, a frame, a carriage mounted for reciprocatory movement .thereon, a rotatable platen on the carriage and over which a paper 'sheet is passed to receive lines of typing, a line-space lever, asroove overwhich the paper sheet travels, a paper feeler pivotally mounted on the carriage and movable into and out of said groove, means tending to move paper-feele'r into said groove, a signal ac- 7| t )f tuated by said paper-feeler, and means operated by the line-space lever for holding thepaperfeeler out of the groove, during carriage return. 3. In a typewriter, in combination, a frame, a

carriage mounted for reciprocatory movement thereon, a rotatable platen on the carriage and over which a paper sheet is passed to receive lines of typing, a'line-space lever, a groove over which the paper sheet travels, a paper-feeler-plvotally mounted 'on the carriage and movable into and out of said groove, means tending to move said paper-feeler into said groove, a signal actuated by said paper-feeler, and means operated by the line-space lever for moving the paper-feeler out of the groove.

4. In a typewriter, in combination, a frame, a,

carriage mounted for reciprocatory movement thereon, a rotatable platen on-the carriage and over which a paper sheet is passed to receive lines of typing, a line-space lever, a groove overwhich the paper sheet travels, a pap'er-feeler pivotally mounted on the carriage and movable into and out of said groove, means-tending to move saidpaper-feeler into said groove, a signal actuated by said paper-feeler, and means operated by the line-space lever for moving and holding the paper-feeler out of the groove. I

5. In a typewriter, in combination, a frame, a

carriage mounted for-reciprocatory movement thereon, a rotatable platen on the carriage and over which a paper sheet is passed to receive lines of typing, a line-space lever, a. groove over which the paper sheet travels, a paper-feeler pivotally mounted on the carriage and movable into and out of said groove, means tending to move said paper-feeler into said groove, a signal actuated by said paper-feeler, and an arm operated by the line-space lever for moving and holding the paper-feeler out of the groove,

6. In a typewriter, in combination, a frame, a carriage mounted for reciprocatory movement thereon, a rotatable platen onthe carriage and over which a paper sheet is passed to receive lines of typing, a groove over which the paper sheet travels, a'paper-feeler pivotally mounted on the carriage and movable into and out of said groove, means tending to move said paper-feeler into said groove, 2. signal actuated by said paperfeeler, a lever pivotally supporting the paperfeeler, an arm mounted on the lever, a linespace lever on the carriage, and means actuated by the line-space lever for engaging said arm to move the paper-feeler out of the groove.

7. In a typewriter, in combination, a frame, a carriage mounted forreciprocatory movement thereon, a rotatable platen on the carriage and over which a paper sheet is passed to receive lines of typing, a line-space lever, a groove over which the paper sheet travels, a paper-feeler pivotally mounted on the carriage and movable into and out of said groove, a spring tending to move said paper-feeler into said groove, a signal actuated by said paper-feeler, and means operated by the line-space lever for holding the paper-feeler out of the groove during carriage return.

8. In a typewriter, in combination, a frame, a

carriage mounted for reciprocatory movement thereon, a rotatable platen on the carriage and over which a paper sheet is passed to receive lines of typing, a groove over which the paper sheet travels, a paper-feeler pivotally mounted on the carriage and movable into and out of said groove, means tending tomove said paper-feeler into said groove, a signal actuated by said paperfeeler, means for actuating the signal including an arm controlled by said paper-feeler, and

9. In a typewriter, in combination, a frame, a carriage mounted for reciprocatory movement I thereon, a rotatable platen on the carriage and over which a paper sheet is passed to receive lines of typing, a groove over which the paper sheet travels, apaper-feeler pivotally mounted on the carriageand movable into and out of said groove,

means for detenting said arm to-render the pageend signal inoperative.

means tending to move said paper-feeler into said groove, a signal actuated by said paper-feeler, means for actuating the signal including an arm controlled by said paper-feeler, a slide mounted a on the carriage, and a detent mounted on the slide, 'said slide moving .said detent into engagement with said arm to render the page-end signal inoperative.

10. In a typewriter, in combination, a frame, a carriage mounted for reciprocatory movement thereon, a rotatable platen on the carriage and over which a paper sheet is passed to receive lines v of typing, a groove over which the paper sheet travels, a paper-feeler pivotally mounted on the carriage and movable into and out of'said groove, means tending to move said paper-feeler into said groove, 'a signal actuated by said paper- ,a carriage mounted for reciprocatory movement thereon, a rotatable platen on the carriage. and

over which a paper sheet is passed to receive lines of typing, a groove over which the paper sheet travels, a paper-feeler pivotally mounted on the carriage and 'movabe into and out of said groove, means tending to move said paper-feeler into said groove, a signal actuated by said paperfeeler, means for actuating the signal including an arm controlled bysaid paper-feeler, adetent for locking said arm, and a finger-piece for moving said detent into and out of engaging position.

12. In a typewriter, in combination, a frame,

acarriage mounted for reciprocatory movement thereon, a rotatableplaten on the carriageand over which apaper sheet is passed to receive.

lines of typing, a groove over which the paper riage and'movable into and out of said groove,

means tending to move said paper-feeler into.

said groove, 9. signal-lamp, and mechanism conditioned by the paper-feeler for actuation ,by said carriage and including a cam-device co-operative with the carriage, when said mechanism is conditioned, .formaking and breaking an electrical circuit to light intermittently said'signal-lamp.

13. In a typewriter, in a letter-feeding carriage mounted for reciprocatory movement thereon, a rotatable platen on the carriage and over which a paper sheet is passed to receive lines of typing, a groove over which the paper sheet travels, a paper-feeler mounted on the carriage and movable into and out of said groove, means tending to move said paper-feeler into said groove, a signal, and mechsheet travels, a paper-feeler mounted on the cari '65 combination, a frame,

anism conditioned by the paper-feeler for actuation by saidnarriage, said mechanism including a series of cams mounted on the carriage and also including a device actuable by said cams,

when said mechanism is conditioned for actuating the signal intermittently throughout the typing of a line.

14. In a typewriter, in combination, a frame, a carriage mounted for reciprocatory movement thereon, a rotatable platen on the carriage and over which a paper sheet is passed to receive lines of typing, a groove over which the paper sheet travels, a paper-feeler mounted on the car- .riage and movable into and out of said groove, means tending to move said paper-feeler into said groove, a signal, and mechanism conditioned end of the platen, a plate rotatable on the platen-' axis, an arm pivoted on the plate, a paper-feeler mounted on said arm and overlying said groove, a spring connecting said arm and said plate and tending to hold said paper-feeler in said groove, an arm pivoted on the side of the carriage, said plate-pivoted arm engaging said carriage-pivoted arm to rock the last-named-arm on its pivot,

a spring fastened to said carriage-pivoted arm for restoring said last-mentioned arm when rocked, a stop on the carriage movable to engage said carriage-pivoted arm to hold it against rockingby said plate-pivoted arm and to hold the paper-feeler out of the groove, means for setting the plate in a plurality of rotatable positions, a bail pivotally mounted on the rear of the carriage by means of pivots on the ends of the bail proper, a link connecting said carriagepivoted arm and an arm of the bail whereby as said carriage-pivoted arm is rocked said bail is rocked, a rack mounted on but offset from the bail proper and formed by oppositely-inclined camming surfaces, a cam fixed on the frame for engaging said rack to rock said bail, a fin mounted lengthwise on the bail proper, a bell-crank.

having a slot in one arm thereof that engages said fin, a switch, an electrical circuit, a signal light in said circuit and mounted on the frame, and an arm connected with the other arm of said bell-crank for opening and closing said switch as said rack moves over said cam.

"16. In a typewriter, in combination, a main frame, a carriagemolmted for reciprocatory movement thereon, a platen rotatable on the care riage'and over which a paper sheet is passed to receive lines of typing,- a groove in and near one.

end of the platen, a platerotatable on the'platenaxis, an arm pivoted on the plate, a paper-feeler molmted on-said arm and overlying said groove,

a spring connecting, said am and said plate and tending to hold said paper-feeler in said groove, an arm pivoted .on the side of the carriage, said plate-pivoted arm engaging said carriage-pivoted arm to rock the last-named arm on its pivot, a

spring fastened to said carriage-pivoted arm for restoringsaid last-mentioned arm when rocked,

a stop on the carriage movable toenme said carriage-pivoted arm to hold it against rocking by said plate-pivoted arm and to hold the paperfeeler' out of the groove, means .for setting the platein a plurality of rotatable positions, a bail pivotally mounted on the rear of the carriage arcane by means of pivots'on the ends of the bail proper, a link connecting said carriage-pivoted arm and an arm of the bail whereby as said carriagepivoted arm is rocked said bail is rocked, a rack mounted on but offset from the bail proper and formed by oppositely-inclined camming surfaces, a cam fixed on the frame for engaging said rack to rock said bail, said fixed cam being mounted for carriage 'case-shifting,'a fin mounted lengthon the bail proper, a bell-crank having a slot in one arm thereof that engages said fin, a switch, an electrical circuit, a signal light in said circuit and mounted on the frame, and an arm connected with the other arm of said bellcrank for opening and closing said switch as said rack moves over said cam.

I 17; In a typewriter, in combination, a main frame, a carriage mounted for reciprocatory movement thereon, a line-space plunger mounted on the carriage, a platen rotatable on the carriage and over which a paper sheet is passed to receive lines of typing, a groove in and near one end of the platen, a paper-feeler, an arm pivoted on a side plate of the carriage on which said paper-feeler is mounted, a spring mounted on said arm and tending" to move said paper-feeler into said groove, an upwardly andforwardly extending arm mounted on said pivoted arm, a part actuated by the line-space plunger and engageable with said extending arm to lock said extending arm in a downward position and against upward movement to permit said paper-feeler to enter said groove, a depending arm fixed to said first two arms, an arm pivoted on the opposite "side of the carriage on the same axis, a rod con-, necting the bottoms of the last two arms, a rockshaft pivotally mounted on the frame, an upstanding arm on said rock-shaft having a slot engaging said rod, 9. depending arm on said rock-shaft, a shaft horizontally pivoted on said depending arm,

a spring-drum for moving the carriage, a circular rack on said drum having a plurality of cams therein, a roller on the end of said shaft engageable with said cams, a switch supporting the-other endof said shaft for lengthwise reciprocation, said switch being openedand closed by said shaft reciprocation and supporting the forward. end of said shaft, an electrical circuit including an electric lamp controlled by said switch, a helical cam for'locking said shaft in the open position of the switch, a knob for rotating said helical cam, and an index and scale on the front of the machine for indicating the position of said helical cam.

18. In a typewriter having a printing line, in combination, means'for line-feeding a page past the printing line, a sensing-device adapted to sense a certain-position of the page relatively to the printing line, means for adjusting said sensing-device relatively to the printing line to variably predeterminesaid position, a signal mechanism conditionable, for actuation by a certain operation of the typewriter, to give a signal concomitantly with said operation, and a universal operative connection between said signal mechanism and sensing-device adapted to enable the sensing-device, as it senses said position, to condition said signal mechanism at any adjustment of said sensing-device.

19. In a typewriter, in combination, types and a letter-feed mechanism co-operative therewith, line-spacing means for line-spacing a page relatively to a printing line of said types, a sensingdevice adapted to sense a certain position of the page relatively to the printing line, means for adjusting said sensing-device relatively; to the printing line to variably predetermine said position, a signal mechanism conditionable, for actuation through operations of said types and letterfeed mechanism, to give a signal concomitantly with said operations, and a universal operative connection between said signal mechanism and sensing-device adapted to enable the sensingdevice as it senses said position to condition said signal mechanism at any adjustment of said pagefeeling device.

20. In a typewriter having a printing line, in combination, a frame, a letter-feed carriage mounted thereon, linespacing means operable to line-space a paper sheet past the printing, line, a sensing-device adapted to sense a certain linespaced position of the paper sheet relatively to the printing line, an electrical circuit adapted to be closed automatically when said sensing-device senses said position, a signal actuable by means I 0 of said circuit when the latter is closed, and

' means moving synchronously with the-carriage for alternately opening and reclosingsaid closed circuit, during the movement of the carriage,-

whereby an intermittent actuation of said signal is procured.

21. In a typewriter having a printing line, in

combination, a frame, a letter-feed carriage mounted thereon, line-spacing means adapted to line-space a paper sheet past-the printing line,

a sensing-device adapted to sense a certain linespaced position of the paper sheet, relatively to the printing line, an electrical circuit adapted to be closed automatically when said sensing-device 45 travels, a paper-feeler mounted on the carriage and movable into and out of-said groove, means tending to move said paper-feeler into said groove, an electric signal-lamp, electric-contact mechanism conditioned by the paper-feeler to close a circuit to light said lamp, a row of cams 5 mounted on the carriage, and means co-operative with said row of dam to open and reclose said closed circuit to cause said lamp to flash inter-. inittently throughout the carriage movement.

23. In a typewriter having a printing line, in 10 combination,'a main frame, a work sheet platen, a case shiftable platen support mounted in said frame for lateral travel, a sensing device mounted on said support and adaptedto sense a certain position of advance of said sheet relatively to the .15

printing line, an actuatable-signal mounted on said main frame, and mechanical connections,

conditioned by said sensing device at said certain position, to translate the lateral travel movements of said platen support into intermittent actuation go of said signal, said connections including devices w enabling'said connections to function irrespective said carriage ada'pted'to sense a certain position of advance of said work sheet, a cam device including two elements, namely, a series of cams 30 and a cam follower, one element being adapted to move synchronously with said carriage and the other being mounted on said frame, said elements normally being out of operative relation,

connections controlled by said sensing device to bring the element on said frame into operative relation with the other element, said connections including two members, on the'carriageand frame, respectively, having sliding connection to permit relative movements of said members in 40 the direction of carriage movements, and a signal "device operable intermittently by the carriage .movements through said cam device. 

